Microscopic calculation of the 3He(alpha,gamma)7Be and 3H(alpha,gamma)7Li capture cross sections using realistic interactions

Abstract

The radiative capture cross sections for the 3He(alpha,gamma)7Be and 3H(alpha,gamma)7Li reactions are calculated in the fully microscopic fermionic molecular dynamics approach using a realistic effective interaction that reproduces the nucleon-nucleon scattering data. At large distances bound and scattering states are described by antisymmetrized products of 4He and 3He/3H ground states. At short distances the many-body Hilbert space is extended with additional many-body wave functions needed to represent polarized clusters and shell-model-like configurations. Properties of the bound states are described well, as are the scattering phase shifts. The calculated S factor for the 3He(alpha,gamma)7Be reaction agrees very well with recent experimental data both in absolute normalization and energy dependence. In case of the 3H(alpha,gamma)7Li reaction the calculated S factor is larger than available experimental data by about 15%.

4 pages, 5 figures, published version

References in corpus (6)

• Nuclear Charge Radii of Be-7,9,10 and the one-neutron halo nucleus Be-11
• Quantum Monte Carlo calculations of neutron-alpha scattering
• Activation measurement of the 3He(alpha,gamma)7Be cross section at low energy
• Nuclear Structure in the Framework of the Unitary Correlation Operator Method
• Astrophysical S-factor of the 3He(alpha,gamma)7Be reaction measured at low energy via prompt and delayed gamma detection
• The 3He + 4He --> 7Be Astrophysical S-factor

Cited by in corpus (3)

• Activation measurement of the 3He(a,g)7Be reaction cross section at high energies
• {Once more about astrophysical $S$ factor for the $\alpha +d\to {}^6\mathrm{Li}+\gamma$ reaction
• Towards Microscopic Ab Initio Calculations of Astrophysical S-Factors